Cutting and spinning mechanism



Jan. 17, 1928.

G. E. HAAK ET AL.

CUTTING AND SPINNING MEGHANISM Filed Jan 27. 1926 gwtwnkom 2f/MJ@ Mrolok 61u 4.

Famed im. i1, 192e. 1,656,277y

' ning operation parti UNITED STATES PATENT OFFICE.

G1031!! l. HMI'AHD ALFRED J'. IIDIBLRY,

oiil Los menus, cannioiimaas- SIGNOR T CALIFORNIA BIBTAURANT-IQUIPIENT OOIPANY, A CORPORATION comme .um srmimve im o b y W. m Application January 87, 1m. Serial lo. 84,044.

This invention relates to mechanism for cuttingw in steam tablesand for spinning the ges of these opemngs, the general purpose being 'to provide simple means for constructing the cover platos of steam tables whichare largely used in restaurants for keeping food hot.`

The general o ject of the invention is to provide. a simple mechanism and a simple tool for eifecting this operation, and which will enable openings of different sizes to be readily cut and formed with fiangesg also to provide means for preventi the spun edge, or ilange on the under side of the cover, from interfering with the perforinance of the cutting and spinning o peration on another opening in close proximity to an opening alread cut.

A further o ject of the invention is to provide a simple combined cutting and spinning tool with which a die can cooperate to effect the cutting of the opening and the spinning of its edge substantially in Aone operation.

Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combinations of parts to be described hereinafter, all of which contribute t o produce an ellicient cutting and spinning mechanism.

A preferred embodiment of the invention is described in the following specification, while the broad scope of the invention is pointed out in the appended claims.

In the drawings: n o

Fig. 1 is a vertical section a spinning table and illustrating the cutting and inning tool in operation; this view shows ige steam table cover in lace with the spinally com leted, and also shows a portion of the spin e and parte of the spindle support broken away.

Fig. 2 is a plan upon a reduced scale showing a portion of a steam table cover in position on the inning table and broken away; parts of t e frame of the spinning table also are broken away.

Fig. 3 is a side elevation showing the upper portion of the spinning table with the lower portion of its frame broken away; this view also shows the steam table cover in position on the die ready to be cut and spun,

spinning tool is supported and particularl illustrates means which we may .employ or clamping the cover in position.

Fig. 4 is a view similar `to Fig. 3, butv cut an opening in the plate, and spin its edge into the die.

' 1g to Fig. 4, but

. 5 is a view similar showing the operation at a further stage in its witl thefsplilnning tool operati 4spin ee Aoteonin intothe blogo of the die. ge pe g In racticing the invention we provide a die -o substantially circular form on the upper face of which the steam table cover is supported. We also provide a cutter and a spinning tool which are preferabl constructed as rotary tools, and if desired, ma be formed in one piece; e cutting an a vertical axis passing through the die; as the rotation occurs around this axis the tool descends and its first effect on the ASsteamth table cover is e operation rogresses the cuttn and spinning tools mgve downwardl an the spinning tool engages the cut Aeggs of the opening and s ins the same down into the bore o the e. In order to accomplish this we provide a spinning table 1 which may be supported on a suitable frame 2 at a convenient height from the floor. This table has a circular opening 3 in it with an annular shoulder 4 which may operate as a seat for a die 5. The die 5 has a shoulder 6 similar to the shoulder 4. i

In cutt' and spinning openings of large diameter t e openin 3 in the table may operate as a die. owever, in Fig. 1 we have illustrated the use of the machine when a relatively small openin is to be formed and spun 1n the steam tagle cover. In this case we provide a special die 7 havin a circular opening 8 with a shoulder 9. iis shoulder 9 supports the smallest die 10 which can be used in the machine. The die 10 is simply a ring with a bore 11 and constructed so that it can be supported on the shoulder 9 with its u pper ace flush with the upper face of the die 7.

The die 7 could of course be used as'a die to cut an opening in it.`

for rotation about to cooperate with the cutting and spinning opening (see Fig. 1)-and sweeps along .the

tool, but as illustrated in Fig. 1, it is operating merely as a holder for the smaller die 10. In order to support the die 10 above the upper face 12 of the spinning table, the d1e 7 1s provided with a plurality of short legs or lugs 13 on its under side which rest on the shoulder 6 of the spinning table.

The steam table cover 14 is in the form of an elongated plate, (see Fig.. 2). In operating upon this plate, it 1s laid in sition on the upper face of the die 10, an if desired, it may be clamped so as to hold it securely in position as the tool performs the cutting and spinning operation.

The cuttin and s inning tool may be supported an rotated) in any suitable manner so that it rotates on the central axis of the opening 11 of the die, and is operated so that it is fed downwardly as the rotation takes place around the axis. The drill spindle of a power drill or drill-press may be readily adapted for this purpose, but any suitable means may be provided for effecting the downward feeding movement. In the present instance we rovide a spindle 15 similar to a drill spin le, but having threads 16 which pass through a threaded opening in a fixed arm 17 formin art of the machine. The lower end o t 's spindle has a centering tool or tipv 18 and when the operation is begun this centering ti 18 is introduced into an opening previo y formed at this center point.

We provide means rotatedJb the spindle for cutting an opening in the p ate or steam table cover 14, and for turning down or spin* ning the edge of this opening into the cylin rical bore 11 of the die 10. For this pur se we prefer to employ a rotary cutter 19 see Fig. 1) which is rotatably attached to an arm 20 mounted ad'ustably in an opening 21 at the lower en of the spindle 15. This arm 20 may be clamped in any adjusted position h a set-screw 22, and the cutter 19 1s mounte which is disposed radially from the central axis of the spindle 15. For this pur se the cutter 19 is mounted to rotate on a orizontal in 23 attached in a laterally projecting head 24 formed at one end of the arm 20.

On the side of the cutter remote from the 'axis of the spindle 15 we provide a spinnin tool 25. This spinning tool may be mounted to rotate on the pin 23, and if desired may be constructed as a part integral with the cutter 19.

In Figure 4 we illustrate the commencement of the cutting and spinning operation; as the spindle 15 rotates, the beveled edge of the cutter 19 cuts an opening in the cover late 14 so that a disc of metal is severed om the plate 14; as the operation progresses the edge 26 (preferabl rounded) of the spinning tool 25 engage t e edge of the for rotation on a horizontal axiscyllndrcal face of the die opening, in this way spinning this edge down into the bore 11 of the die to form a cylindrical flange.

In the o eration of the spinning tool and die, it will) be evident that as the spinning wheel moves down into the opening of the die it is disposed as a chord across the edge of the circular opening of the die. In other words the plane of the wheel is in the plane of a chord of the circle of the opening, and the spinning wheel at two .diametrically o posite points on its edge, presses the spun e e against the face of the die.

hen lar e openings are beng formed in the steam ta le cover, or plate 14, the flange of an opening already formed may not interfere with the formation of other openings; in other words, the tlange already formed may clear the ed e of the s inning table. But in' case it is esired to crm an opening close to another opening which has already been formed, the forming die may be supported clear above the upper face of the spinning table as illustrated in Fig. 1. In this view the flange 27 of an opening already formed in the steam table cover is illustrated supported clear of the upper face 12 of the spinning table.

Fig. 5 shows the o ration of spinning substantially complete and in this view the spinning tool is re resented as coo rating with a large sized ie su ported in 518e table so that its up er face is ush with the upper face of the ta le; in other words, the die 28 illustrated in Fig. 5 corresponds to the die 5 which in Fig. 1 is merely operating as a die holder.

If it is desired to employ clamping means for securing the steam table cover when being operated upon, any suitable means may be employed for this purpose. If desired, a pair of horizontal arms 29 ma be provided to project out over the ed e o the cover 14 (see Figs. 2 and 3) and t ese larms may be provided with ordina screw clamps 30 which can be screwed ldbwn so as to clamp the cover ainst the top of the Spinning table or against blocks 31 set in sition on the u per face of the spinning tabl; as illustrate in Fig. 3.

It will be evident that this invention enables openings to be very quickly cut and spun in steam table covers or any similar operation to be performed; and our invention enables the cutting and spinning to be performed substantially as a single o eration. By providin dies of different diameters it will be evicglent that the same spinning table can be used to enable opemngs of different sizes to be readily cut and spun.

It is understood that the embodiment of the invention described herein is only one of the man embodiments this invention may take, an we do not wish to be limited in the practice of the invention, nor in the claims, to the particular embodiment set forth.

What We claim is 1. In a machine for cutting openings and spinning their edges in steam table covers or the like, the combination of a die having a circular opening, for supporting the steam table cover, a rotating arm mounted to rotate about the vertical axis passing through the center of the die opening, a cutter carried on the arm for cutting a hole through the cover as the arm rotates, a spinning tool in the form of a wheel removed from the plane of the cutter, and car ried by the arm further from the axis of rotation than the cutter, means for advancing the arm downwardly as the same rotates to move the spinning wheel into the die opening with the plane of the wheel disposed as a chord of the circular opening and cause its edge at two diametrically opposite points to sweep along the inner face of the die opening and cooperate with the same to spin the edge of the opening in the cover down into the die.

2. A combined cutting and Spinnin tool to cooperate with a circular die opening to cut openings in steam tables and spin their edges, having an arm for attachment to a rotary spindle, a cutter carried by the end of the arm, and a rotating spinning tool in the form of a wheel with a. projecting ed su ported on the arm and located on t e si e of the cutter remote from the arm, said spinning tool constructed to pass down into the die opening in the plane of a chord of the circular opening, and havin a rounded edge olperating .to sweep alon t e inner face of t e circular die at two iametrically opposite points, and cooperate with the same to spin the edge of the opening in the cover against the face of the opening in the die.

3. In a machine for cutting o enings in steam table covers and spinning t cir edges, the combination of a die having a circular opening with a cylindrical face, a cutter mounted to rotate on the axis of the die opening and operating to cut an opening in the cover, a Aspinning tool in the form of a wheel supported on the side of the cutter remote from the said axis, means for moving the cutter and spinning tool downwardly as the same rotate, to cut an opening in the cover, said spinning tool operating to extend as a chord in the clroular opening and press the edge of the spun material at two diametrically opposite points on the wheel against the cylindrical face, and having a rounded edge.

Signed at Los Angeles, California, this 20 day of January, 1926.

GEORGE E. HAAK. ALFRED J. KIMBERLEY. 

